Refrigerating system



Dec. 1932- LE ROY A. DROEYSCHER 1,890,282

REFRIGERATING SYSTEM Filed March 10, 1951 7 Patented Dec. 6, 1932 UNITED sTATEs PATENT, oEFlcjE 4 l I LE BOY 'A. DROESCHEB: OI WILLOW GROVE, PENNSYLVANIA, ASSIGNOB TO 0. H. WHEELER MAINIIIFACTUBJINGv COMPANY, 01' PHILADELPHIA, PENNSYLVANIA, A.

CORPORATION or PENNSYLVANIA BEFRIGERATING SYSTEM Application 'flled March 10, 1981, Serial No. 521,414.

My invention'relates to refrigerating systems of the character in which the refrigerating medium, as brine or equivalent, is circu-' lated through a-tank in which are disposed the containers for the material to be cooled or frozen.

My invention resides in a refrigerating system of the character hereinafter described and claimed.

For an'understanding of my inventionreference is to be had to the accompanying drawing, illustrative of one of the forms my invention maytake. I

In the drawing, which is an elevational view, partly in section, T represents a tank which may be constructed of concrete or the like in which is embedded the structure 1 of any suitable material for reinforcement,

. involved, including the manufacture of artificial ice, that medium is withdrawn by the pump P and supplied to the header or manifold 2. I

lVithin the tank T is disposed any suitable number of refrigerating receptacles or cans C, each of which, in the example illustrated, is provided with a" surrounding casingK, spaced therefrom, terminating short of the top of the can C, and extending below the bottom of the can to form a wall of a compartment 3 with which communicates a conof wood or the like, resting upon or embedded in the bottom of the tank Between the can C and its casing K may be disposed ribs or strips 6 serving both as heat transfer fins and as means for defining vertical individual passages for cooling medium connecting with the compartment 3. Structure of this character is shown in my application Serial No. 518,679, filed F ebruary 27, 1931.

In the arrangement shown there is deliv-v ered to each can an individual supply -of Within the tank T may be provided thewall or we1r 8 extending to height short of i the tops of the cans C or approximately to the tops of the casingsK. The cooling medium overflowing the tops of the casings K accumulates to theleft of the weir .8, over- 'flowing the weir into the compartment 9- with which the aforesaid connection/Z 00111 munica-tes. I g

The medium is drawn through the pipe 7 nto the chamber 10 of a flash evaporator F which, in the example illustrated, comprises the shell 11 into which the cooling medium is delivered through spray nozzles 12, the

liquid continuing-downwardly through the shell 11, to one side of the bafile 13, over strips or gratings 14 for retarding its fall and breaking it up or further-"subdividing it;

In the evaporator F'is maintained an extremely high vacuum, or low absolute pressure, as of the order of two millimeters of mercury, in the case where brine is the cooling medium for freezing water into ice in the cans C. From one side of the bafiie' 13' vapor passes through the connection 15 into the suction chamber of the ejector E having the nozzle structure N utilized in expanding steam or other elastic motive fluid, under suitable pressure, into jets which entrain the vapor aforesaid, the mixture pass ing throughthe diffuser structure G and is delivered at higher pressure through the barometric condenser 17.

The temperature of the brine or cooling medium is lowered to the desired or suitable degree in the flash evaporator F from whose connection 16 into the lower portion of the shell 11 it passes through the barometric column 18 into the aforesaid receptacle or reservoir R from which it is withdrawn by the pump P and returned the tank T.

The rate of withdrawal of vapor from the to the receptacles in I evaporator F is suficient to reduce thetem water, a valve 2-0. controlled by t perature of the cooling medium to the desired de The vacuum within the evaporator F is greater than that corresponding to the temperature shown as a barometric condenser, may be of v any other suitable type, as a surface condenser. To make up for the vapor withdrawn from the evaporator F by the ejector E, there is provided in the pipe 19, dellverinfi make-up e float 21 resting upon the coolingmedium within the reservoir R falls valve is opened to degree to admlt suflicient water from the line 19 to the connection 22, which delivers into the chamber 10 of the evaporator F, to maintain substan' tially constant the total cooling med1um of the s stem. The make-up water becomes 1 11- termmgled with the cooling medium dehyered by the connection 7, therewith 'is chilled to suitably'low temperature in the evaporator. To'the water box or chamber 2 3 of the condenser, 17 is elivered its cooling medium, such as cooli g water, throu h the pipe 2:1 controlled by he valve 25. delivered through the spray nozzles 12 and descends over the gratings 14. The finely divided cooling water comes into contact with the vapor andnon-condensibles delivered by the ejector E through theconnection 116, condensing the condensible components which'as liquid passes through the column 26,-, into any sultable receptacle 27, having a port oraperture 28 through which the water passes to waste, or, if desired, is delivered to a cooling tower or other suitable cooling means, and then re-used as coolingjwater delivered through the pipe 24.

The non-condensible vapors and gases, as leakage air, are drawn ofi from the top of the condenser ter-condenser 30. is in the example illustrated a barometric condenser whose cooling water is derived from the pipe 24-delivered through spray nozzles 12. The suction chamber of the ejector E2 communicates with the inte- 1101 of the condenser 30through the downwardly directed pipe 31, generally similar to- ;the connection 16. The water from the con-' denser '30 is discharged through the column 32 into the column 26, or separately into the zecieptacle 27, or. to suitable separate recepac e. v a

What I claim is: a 1. A system for producing ice comprising of the entering injection or cool-' 'ing water in the condenser 17 which though.

"said evaporator,

As the level of the medium and in mixture ooling-wa'ter 1s 17 through the passage 29 to the suction chamber of the steam operated holding water to be frozen, anevaporator,

a connection from said tank conveying coolinfiimedium therefrom to said evaporator in w ch it is lowered in temperature, means for maintaining high vacuum in said evapo-v rator, a receptacle or cooling medium from a connection communicating' with said evaporatorthrough which make-up water is delivered to be co-mingled with the cooling medium and lowered in temperature therewith, means controlling de- I liv of make-up water through said connection in response to variations in the amount of cooling medium-from said evaporator, and 30 the cooling medium to means for delivering said tank.

2 A system veymg the cooling medium therefrom to said i evaporator, an ejector for withdrawing vapors from said eva con enser means for delivering make-up liq- 10a to' said evaporator, means for causing and make-up liquid to c'o-mingle with the cooling medium within the evaporator, and

mea'ns for returning the cooling medium concentrate including said make-up liquid to said reservoir.

3. A-system a tankhaving a plurality of receptacles therein for holdin from said reservoir conveying the cooling mediumftherefrom to said tank, a flas eva orator, a connection from sald tank con veymg the cooling medium-therefrom to said evaporator, SaId' evaporator comprising a811 chamber in which said cooling medium is sprayed, a reservoir, :1. barometric column dea condenser into which said ejector discharges, and means for maintaininga vacuum in said condenser.

A ystem forvproducmg ice, comprisliti ing a tank having a plurality of receptacles therein for holding water to be frozen, at reservoir for a COOllIlg medium, a connection" from said reservoir conveying the cooling medium therefrom to said tank, a flasks;-

for producing ice, compris I mg a tank having a plurality of receptacles; therem for holding water tobe frozen, e9 5 orators, and raising them in ressure, a con enser into which said ejector ischarges, means for delivering cool-; I

water to said condenser, means for main- -ta1mng a vacuum in said condenser, said ejecfor producing ice, comprising p water to be frozen, a reservo1r for a cooling medium, a connectlon in evaporator, a connection from said tank conveying the cooling mediumtherefrom to said evaporator, said evaporator comprising a chamber in which said cooling medium is sprayed, a barometric column delivering the cooling medium from said evaporator to said reservoir,- an'ejector for withdrawing vapors from said evaporator to maintain high vac uum therein, a barometric condenser into a tank having a plurality of receptacles therein for holding water to be frozen, a

reservoir for acooling medium, a connection from said reservoir conveying the cooling medium therefrom to said tank, a flash evaporator, a'connection from said tank conveying the cooling medium therefrom to said evaporator, an ejector for withdrawing vapors from said evaporator, and raising them in pressure, a condenser into which said ejector discharges, means for delivering cooling water to said condenser, means for maintaining a vacuum in said condenser, said ejector maintaining in said evaporator a vacuum higher than that corresponding with the temperature of said cooling water-in said condenser, means for delivering. make-up water to said evaporator, means in said evap oratorfor spraying said make-up water to co-mingle with the condensate of said cooling therefrom to said tank, a flash evaporator a connection from said tank conveying e cooling medium therefrom to said evaporator, said evaporator comprising a chamber in which said cooling medium is sprayed, an

ejector-for withdrawing vapors from said 1 arometric condenser into which said ejector discharges,- an ejector producing a vacuum in said barometric condenser, a condenser into which said last named ejector discharges, an ejectgr for'producing a vacuum in said last named condenser, means for delivering make-up water to said evaporator, means in said evaporator for spraying said make-up water to coQmingle with the condensate of the cooling medium, and means in: V cludinga barometric'column for deliverin the condensate and make-up water to sai reservoir.

LE ROYI A, nnoEscHER:

evalporator to maintain high vacuum therein,

medium, and means for delivering the condensate and the makeiup water to said reserv '6. A system for producing ice,'comprising a tank having a plurali of receptacles there'm for holding water-to voir for a cooling medium, a connection from said reservoirconveying the cooling medium therefrom to said tank, a flash evaporator, a connection from said tank conveying the cooling medium therefrom to said evaporator, said evaporator comprising a chamber in which said coolingmedium is sprayed, an ejector for withdrawing vapors from said evaporator'to maintain high vacuum therein, a condenser into which said ejector discharges, means for maintaining a vacuum in said condenser, means for delivering makeup water to said flash evaporator, means in said evaporator for spraying said make-up water to co-mingle with the condensate of said cooling medium, and means for delivering the condensate and make-up water to said reservoir.

7 A system for producing ice, comprising a tank having a plurality of receptacles therein for holding water to be frozen, a reservoir for a cooling medium, a connection from said reservoir conveying the cooling medium 

